The periodic table of chemical elements, often called the periodic table, organizes all discovered chemical elements in rows (called periods) and columns (called groups) according to increasing atomic ...

But how many of these elements do you know? Test your knowledge and compete with other Live Science readers to see who can ...

As you move from left to right across the periodic ... charge) and electrons, pulls the electrons closer together, hence the smaller size. As you move down a group in the periodic table, the ...

The elements were placed in the periodic table’s seventh row ... by the natural repulsion of protons because of their like charges. “The Germans brought the target and projectile nuclei ...

Scientists have found that our bodies need 28 different elements to function properly. These are almost one-quarter of the periodic table and are mainly found in the first four periods.